725144 has 32 divisors (see below), whose sum is σ = 1624320. Its totient is φ = 296736.

The previous prime is 725119. The next prime is 725147. The reversal of 725144 is 441527.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725144.

It is not an unprimeable number, because it can be changed into a prime (725147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (50760).

2⁷²⁵¹⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812160).

725144 is an abundant number, since it is smaller than the sum of its proper divisors (899176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725144 is a wasteful number, since it uses less digits than its factorization.

725144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 725144 is about 851.5538738095. The cubic root of 725144 is about 89.8410362659.

The spelling of 725144 in words is "seven hundred twenty-five thousand, one hundred forty-four".